(;GM[1]FF[4]SZ[19]
GN[Failure 4]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem41/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem41/Solution

Failure 4]
PL[W]

AB[jb][qb][jc][oc][pc][qc][ld][md][nd]
AW[kb][lb][ob][pb][mc][nc]
LB[ka:a]

;W[nb]C[W1]MN[1]
;B[ma]C[B2]MN[2]
;W[pa]C[W3]MN[3]
;B[na]C[B4]MN[4]

;LB[ka:a]
)
